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Maternal human habituation enhances sons' risk of human-caused mortality in a large carnivore, brown bears

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Title: Maternal human habituation enhances sons' risk of human-caused mortality in a large carnivore, brown bears
Authors: Shimozuru, Michito Browse this author →KAKEN DB
Shirane, Yuri Browse this author
Yamanaka, Masami Browse this author
Nakanishi, Masanao Browse this author
Ishinazaka, Tsuyoshi Browse this author
Kasai, Shinsuke Browse this author
Nose, Takane Browse this author
Shirayanagi, Masataka Browse this author
Jimbo, Mina Browse this author
Tsuruga, Hifumi Browse this author
Mano, Tsutomu Browse this author
Tsubota, Toshio Browse this author
Issue Date: 5-Oct-2020
Publisher: Nature Research
Journal Title: Scientific reports
Volume: 10
Issue: 1
Start Page: 16498
Publisher DOI: 10.1038/s41598-020-73057-5
Abstract: Human habituation of large carnivores is becoming a serious problem that generates human-wildlife conflict, which often results in the removal of animals as nuisances. Although never tested, human habituation potentially reduces the fitness of adult females by reducing their offspring's survival as well as their own, due to an increased likelihood of human-caused mortality. Here, we tested this hypothesis in brown bears inhabiting Shiretoko National Park, Japan. We estimated the frequency of human-caused mortality of independent young (aged 1-4 years) born to mothers living in areas with different maternal levels of human habituation and different proximities to areas of human activity. The overall mortality rate was higher in males than in females, and in females living near a town than those in a remote area of park. Surprisingly, more than 70% of males born to highly habituated mothers living around a remote wildlife protection area were killed by humans; this proportion is greater than that for males born to less-habituated mothers living in almost the same area. The current study clarified that interactions among maternal human habituation, birthplace (proximity to town), age, and sex determine the likelihood of human-caused mortality of brown bears at an early stage of life.
Type: article
Appears in Collections:獣医学院・獣医学研究院 (Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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